package com.ruoyi.common.utils;

import org.apache.commons.lang3.time.DateFormatUtils;

import java.lang.management.ManagementFactory;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.*;
import java.time.format.DateTimeFormatter;
import java.util.Calendar;
import java.util.Date;
import java.util.Objects;

/**
 * 时间工具类
 * 
 * @author ruoyi
 */
public class DateUtils extends org.apache.commons.lang3.time.DateUtils
{
    public static String YYYY = "yyyy";

    public static String YYYY_MM = "yyyy-MM";

    public static String YYYY_MM_DD = "yyyy-MM-dd";

    public static String YYYY_MM_DD_C = "yyyy年MM月dd日";

    public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";

    public static String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";

    private static String[] parsePatterns = {
            "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM", 
            "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM",
            "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};

    /**
     * 获取当前Date型日期
     * 
     * @return Date() 当前日期
     */
    public static Date getNowDate()
    {
        return new Date();
    }

    /**
     * 获取昨天Date型日期
     *
     * @return Date() 当前日期
     */
    public static Date getYesterdayDate() {
        Calendar cal = Calendar.getInstance();
        cal.add(Calendar.DATE, -1);
        Date yesterdayDate = cal.getTime();
        return yesterdayDate;
    }


    /**
     * 获取当前日期, 默认格式为yyyy-MM-dd
     * 
     * @return String
     */
    public static String getDate()
    {
        return dateTimeNow(YYYY_MM_DD);
    }

    public static final String getTime()
    {
        return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
    }

    public static final String dateTimeNow()
    {
        return dateTimeNow(YYYYMMDDHHMMSS);
    }

    public static final String dateTimeNow(final String format)
    {
        return parseDateToStr(format, new Date());
    }

    public static final String dateTime(final Date date)
    {
        return parseDateToStr(YYYY_MM_DD, date);
    }

    public static final String parseDateToStr(final String format, final Date date)
    {
        return new SimpleDateFormat(format).format(date);
    }

    public static final Date dateTime(final String format, final String ts)
    {
        try
        {
            return new SimpleDateFormat(format).parse(ts);
        }
        catch (ParseException e)
        {
            throw new RuntimeException(e);
        }
    }

    /**
     * 日期路径 即年/月/日 如2018/08/08
     */
    public static final String datePath()
    {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyy/MM/dd");
    }

    /**
     * 日期路径 即年/月/日 如20180808
     */
    public static final String dateTime()
    {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyyMMdd");
    }

    /**
     * 日期型字符串转化为日期 格式
     */
    public static Date parseDate(Object str)
    {
        if (str == null)
        {
            return null;
        }
        try
        {
            return parseDate(str.toString(), parsePatterns);
        }
        catch (ParseException e)
        {
            return null;
        }
    }

    /**
     * 获取服务器启动时间
     */
    public static Date getServerStartDate()
    {
        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        return new Date(time);
    }

    /**
     * 将 yyyy-MM-dd 转换为 年月日格式
     */
    public static String convertToChineseDate(Date date) {
        try {
            SimpleDateFormat outputFormat = new SimpleDateFormat("yyyy年MM月dd日");
            return outputFormat.format(date);
        } catch (Exception e) {
            throw new IllegalArgumentException("日期格式错误: " + date, e);
        }
    }

    /**
     * 计算相差天数
     */
    public static int differentDaysByMillisecond(Date date1, Date date2)
    {
        return Math.abs((int) ((date2.getTime() - date1.getTime()) / (1000 * 3600 * 24)));
    }

    /**
     * 计算时间差
     *
     * @param endTime 最后时间
     * @param startTime 开始时间
     * @return 时间差（天/小时/分钟）
     */
    public static String timeDistance(Date endTime, Date startTime)
    {
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        // long ns = 1000;
        // 获得两个时间的毫秒时间差异
        long diff = endTime.getTime() - startTime.getTime();
        // 计算差多少天
        long day = diff / nd;
        // 计算差多少小时
        long hour = diff % nd / nh;
        // 计算差多少分钟
        long min = diff % nd % nh / nm;
        // 计算差多少秒//输出结果
        // long sec = diff % nd % nh % nm / ns;
        return day + "天" + hour + "小时" + min + "分钟";
    }

    /**
     * 使用 compareTo() 方法比较
     * @return -1: date1 < date2, 0: date1 == date2, 1: date1 > date2
     */
    public static int compareDates(Date date1, Date date2) {
        if (date1 == null && date2 == null) {
            return 0;
        }
        if (date1 == null){
            return -1;
        }
        if (date2 == null){
            return 1;
        }
        return date1.compareTo(date2);
    }

    /**
     * 增加 LocalDateTime ==> Date
     */
    public static Date toDate(LocalDateTime temporalAccessor)
    {
        ZonedDateTime zdt = temporalAccessor.atZone(ZoneId.systemDefault());
        return Date.from(zdt.toInstant());
    }

    /**
     * 增加 LocalDate ==> Date
     */
    public static Date toDate(LocalDate temporalAccessor)
    {
        LocalDateTime localDateTime = LocalDateTime.of(temporalAccessor, LocalTime.of(0, 0, 0));
        ZonedDateTime zdt = localDateTime.atZone(ZoneId.systemDefault());
        return Date.from(zdt.toInstant());
    }

    /**
     * ISO8601 时间格式：
     * yyyyMMdd’T’HHmmss+当前时区，例如，北京时间
     * 20220301T153520+08:00
     * 增加 String ==> LocalDateTime
     */
    public static LocalDateTime strToLocalDateTime(String timeString) {
        if (StringUtils.isBlank(timeString)){
            return null;
        }
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyyMMdd'T'HHmmssXXX");
        LocalDateTime localDateTime = LocalDateTime.parse(timeString, formatter);
        return localDateTime;
    }

    /**
     * ISO8601 时间格式：
     * yyyyMMdd’T’HHmmss+当前时区，例如，北京时间
     * 20220301T153520+08:00
     * 增加 LocalDateTime ==> String
     */
    public static String localDateTimeToStr(LocalDateTime localDateTime) {
        if (Objects.isNull(localDateTime)){
            return null;
        }
        DateTimeFormatter fmt = DateTimeFormatter.ofPattern("yyyyMMdd'T'HHmmssXXX");
        String str = localDateTime.atZone(ZoneId.of("Asia/Shanghai")).format(fmt);
        return str;
    }

    /**
     * 转成系统默认时区（东八区）
     * 2025-08-27T00:15:50+08:00
     * 增加 String ==> LocalDateTime
     */
    public static LocalDateTime strToLocalDateTimeUTC(String timeString) {
        if (StringUtils.isBlank(timeString)){
            return null;
        }
        OffsetDateTime odt = OffsetDateTime.parse(timeString);
        LocalDateTime localDateTime = odt.toLocalDateTime();
        return localDateTime;
    }

    /**
     * 计算差异并返回格式化字符串
     */
    public static String getFormattedDifference(LocalDateTime start, LocalDateTime end) {
        Duration duration = Duration.between(start, end);

        long days = duration.toDays();
        long hours = duration.toHours() % 24;
        long minutes = duration.toMinutes() % 60;
        long seconds = duration.getSeconds() % 60;

        StringBuilder result = new StringBuilder();

        if (days > 0) {
            result.append(days).append("天");
        }
        if (hours > 0) {
            result.append(hours).append("小时");
        }
        if (minutes > 0) {
            result.append(minutes).append("分钟");
        }
        if (seconds > 0 || result.length() == 0) {
            result.append(seconds).append("秒");
        }

        return result.toString();
    }
}
